User blog comment:Dante-Must-Die-Mode/What The Heaven And Hell?: Nero/@comment-967403-20150329222022/@comment-6769189-20150330074917

I have to disagree about Rebellion completely. We have no evidence it existing before Dante. Its a manifestation his power, it can't exist before Dante. Its like his Zanpakuto. The Bakusaiga to his Sesshomaru. It has also temporarily activated before without his blood.

Baul and Modeus swords also look nothing like Rebellion. At best Bauls has a vague silhouette to the ribcage but it looks nothing like a ribcage.

Again we have seen that it is possible to resonate with a weapon. It has happened with Sparda Sword twice. Who is to say someone else under the same circumstances couldn't have fixed Yamato? How do We know Trish doesn't know of a way to fix Devil Arms? Science was Agnuses strong point. He had great trouble putting some souls in armor when Arius could create artificial beings himself.

Does Nero have a special connection to Yamato? He does now. Before that? Nothing suggests it.